The secret for me is that I don't draft, proofread, cross-reference, or revise.
For this particular case, these posts are bolstered by the fact that they are introductory posts, and thus have a lot more narrative 'time' to cover. We can freely yap about the entirety of the journey, our character's internal monologues with regards to the city and/or festival, and don't have to involve any other PCs in the yapper-y. So yeah, there's an acceptance that most of the post that is written wouldn't be addressed ICly by others.
Ultimately though, long posts are more a consequence of someone vibing rather than an objective, especially if you're not in an RP that has strict minimum words per post hijinks.
For this particular case, these posts are bolstered by the fact that they are introductory posts, and thus have a lot more narrative 'time' to cover. We can freely yap about the entirety of the journey, our character's internal monologues with regards to the city and/or festival, and don't have to involve any other PCs in the yapper-y. So yeah, there's an acceptance that most of the post that is written wouldn't be addressed ICly by others.
Ultimately though, long posts are more a consequence of someone vibing rather than an objective, especially if you're not in an RP that has strict minimum words per post hijinks.